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TOPIC: BOTTOM VELOCITIES

BOTTOM VELOCITIES 11 years 7 months ago #8231

  • ju
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Hello

I would like to represent bottom velocities in my simulation.
How can i do ? Which variable i have to use ? friction velocity ?

Best regards,

Julien
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BOTTOM VELOCITIES 11 years 7 months ago #8233

  • jmhervouet
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Hello,

The meaning of "bottom velocity" is not clear for me in 2D, if you mean friction velocity it is US in the VARIABLES FOR GRAPHIC PRINTOUTS.

Regards,

JMH
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BOTTOM VELOCITIES 11 years 7 months ago #8236

  • ju
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Hello,

Effectively, it would be better to represent bottom velocities with Telemac3D.
I have an other question : how is calculate friction velocity (US) ?

Thanks a lot

JL
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BOTTOM VELOCITIES 11 years 7 months ago #8237

  • jmhervouet
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Hello,

The friction velocity is built in subroutine preres_telemac2d.f (library telemac2d), under the header "COMPUTES FRICTION SPEED", basically it is:

SQRT(CF*(U**2+V**2)/2)

where CF is the non dimensional friction coefficient.

Regards,

JMH
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